Specification a, 2titanium, Boron base grain refiner for hypo, Eutectic alloy. 0. 1, 0. 2%a, 2bonly boron based grain refiner for hypo, Eutectic alloy. 0. 1, 0. 2%a, 113 p phosphorus base grain refiner for hyper eutectic alloy. 0. 2, 0. 4%a, 113 m a, 4hdiluted version of a, 20. 1, 0. 2%